ZyXEL Communications B-5000 - Guía de usuario descargar pdf (Pagina 236)

ZyAIR B-5000 User’s Guide

28-8 Firewall

28.6.1 TCP

Transmission Control Protocol is a connection-oriented transport service that ensures the reliability of

message delivery. It verifies that messages and data were received.

28.6.2 UDP

User Datagram Protocol (UDP) is a connectionless transport service that dispenses with the reliability

services provided by TCP. UDP gives applications a direct interface with the Internet Protocol (IP) and the

ability to address a particular application process running on a host via a port number without setting up a

connection session.

28.6.3 ICMP

Internet Control Message Protocol is a message control and error-reporting protocol between a host server

and a gateway to the Internet ICMP uses Internet Protocol (IP) datagrams, but the messages are processed by

the TCP/IP software and are not directly apparent to the application user.

28.6.4 IP

Internet Protocol (IP) is the underlying protocol for routing packets on the Internet and other TCP/IP-based

networks.

28.6.5 Configuring Firewall Access Control

Click FIREWALL and then ACCESS CONTROL to open the Firewall Config. – Access Control screen

(see Figure 28-6). Use this screen to enable firewall access control.

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ZyXEL Communications B-5000 - Guía de usuario Pagina 236